BlackRock Municipal Income Fund, Inc. (MUI)
MUI moved a median of 0.00% 30 minutes after news, and 0.00% by the close. How MUI actually reacts to news — the realized, point-in-time move the market made, measured across 72 labeled events over the last three years with zero look-ahead.
MUI’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 32% | 62 |
| 30-min | 0.00% | 47% | 68 |
| 60-min | 0.00% | 43% | 68 |
| to close | 0.00% | 44% | 68 |
| Middle 50% of MUI reactions | -0.09% to +0.12% |
|---|---|
| Median reaction (30-min) | 0.00% |
| Measured reactions | 72 |
Half of all BlackRock Municipal Income Fund, Inc. news events land between -0.09% and +0.12% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
Email me when MUI moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to MUI's baseline. Nothing else.
Recent MUI events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| BlackRock Municipal Income Fund, Inc. (MUI) Completes Conversion to Interval Fund Structure | Press release | Business Wire | — | — | |
| BlackRock Municipal Income Fund, Inc. (MUI) Declares Final Distribution as Part of its Conversion to the Institutional Share Class (MUNEX) of BlackRock Municipal Credit Alpha Portfolio, Inc. | Press release | Business Wire | — | — | |
| BlackRock Municipal Income Fund, Inc. (MUI) Announces 2025 Repurchase Schedule and Initial Repurchase Amount in Connection with Upcoming Conversion to Unlisted Continuously-Offered Closed-End Fund | Press release | Business Wire | — | — | |
| BlackRock Municipal Income Fund, Inc. (MUI) Delists from the NYSE in Connection with the Conversion to an Unlisted Interval Fund Structure | Press release | Business Wire | — | — | |
| Form N-CEN/A BLACKROCK MUNICIPAL INCO For: Jul 31 | SEC filing · Form N-CEN | SEC EDGAR | +0.04% | -0.08% | |
| Form 8-K BLACKROCK MUNICIPAL INCO For: Jan 20 | SEC filing · Form 8-K | SEC EDGAR | -0.11% | -0.25% | |
| Form NPORT-P BLACKROCK MUNICIPAL INCO For: Oct 31 | SEC filing · Form NPORT-P | SEC EDGAR | -0.12% | -0.12% | |
| BlackRock Municipal Income Fund, Inc. (MUI) Provides De-Listing and Conversion Dates for Upcoming Conversion to Unlisted Continuously-Offered Closed-End Fund | Press release | Business Wire | +0.00% | -0.41% | |
| BlackRock Municipal Income Fund, Inc. (MUI) Announces Final Results of Tender Offer | Press release | Business Wire | -0.49% | +0.25% | |
| BlackRock Municipal Income Fund, Inc. (MUI) Expiration and Preliminary Results of Tender Offer | Press release | Business Wire | +0.08% | +0.08% | |
| Form N-2 BLACKROCK MUNICIPAL INCO | SEC filing · Form N-2 | SEC EDGAR | +0.16% | +0.32% | |
| Form N-CEN BLACKROCK MUNICIPAL INCO For: Jul 31 | SEC filing · Form N-CEN | SEC EDGAR | +0.00% | +0.08% | |
| BlackRock Municipal Income Fund, Inc. (MUI) Announces Tender Offer in Conjunction with Conversion to an Unlisted Closed-End Interval Fund Structure | Press release | Business Wire | +0.23% | -0.23% | |
| Form N-CSR BLACKROCK MUNICIPAL INCO For: Jul 31 | SEC filing · Form N-CSR | SEC EDGAR | +0.00% | +0.12% | |
| BlackRock Announces Results of Shareholder Vote at Special Meeting Relating to BlackRock Municipal Income Fund, Inc. (MUI) Conversion to Unlisted Closed-End Interval Fund Structure | Press release | Business Wire | -0.16% | +0.00% | |
| Form NPORT-P BLACKROCK MUNICIPAL INCO For: Jul 31 | SEC filing · Form NPORT-P | SEC EDGAR | — | +0.08% | |
| Form DEFR14A BLACKROCK MUNICIPAL INCO | SEC filing · Form DEFR14A | SEC EDGAR | -0.08% | +0.16% | |
| Form DEFR14A BLACKROCK MUNICIPAL INCO | SEC filing · Form DEFR14A | SEC EDGAR | -0.08% | -0.16% | |
| BlackRock Municipal Income Fund, Inc. (MUI) Announces Variable Rate Demand Preferred Shares Action | Press release | Business Wire | +0.00% | -0.16% | |
| Form DEFA14A BLACKROCK MUNICIPAL INCO | SEC filing · Form DEFA14A | SEC EDGAR | +0.00% | +0.00% | |
| Form DEFA14A BLACKROCK MUNICIPAL INCO | SEC filing · Form DEFA14A | SEC EDGAR | +0.24% | -0.40% | |
| Form N-23C-2 BLACKROCK MUNICIPAL INCO For: Aug 28 | SEC filing · Form N-23C-2 | SEC EDGAR | +0.00% | +0.00% | |
| Form N-PX BLACKROCK MUNICIPAL INCO For: Jun 30 | SEC filing · Form N-PX | SEC EDGAR | — | +0.00% | |
| Form DEFA14A BLACKROCK MUNICIPAL INCO | SEC filing · Form DEFA14A | SEC EDGAR | -0.04% | -0.24% | |
| Form DEF 14A BLACKROCK MUNICIPAL INCO For: Sep 06 | SEC filing · Form DEF | SEC EDGAR | +0.00% | +0.08% | |
| BlackRock Municipal Income Fund, Inc. (MUI) Announces Variable Rate Demand Preferred Shares Action | Press release | Business Wire | -0.06% | -0.16% | |
| Form PRE 14A BLACKROCK MUNICIPAL INCO For: Jul 05 | SEC filing · Form PRE | SEC EDGAR | +0.00% | -0.16% | |
| Form NPORT-P BLACKROCK MUNICIPAL INCO For: Apr 30 | SEC filing · Form NPORT-P | SEC EDGAR | +0.08% | +0.08% | |
| Board of BlackRock Municipal Income Fund, Inc. (MUI) Approves Conversion to Unlisted Closed-End Interval Fund Structure | Press release | Business Wire | -0.08% | +0.16% | |
| Form DEFA14A BLACKROCK MUNICIPAL INCO | SEC filing · Form DEFA14A | SEC EDGAR | -0.08% | +0.16% | |
| Form DEFA14A BLACKROCK MUNICIPAL INCO | SEC filing · Form DEFA14A | SEC EDGAR | +0.25% | -0.33% | |
| Form DEFR14A BLACKROCK MUNICIPAL INCO | SEC filing · Form DEFR14A | SEC EDGAR | +0.00% | -0.08% | |
| Form DEF 14A BLACKROCK MUNICIPAL INCO For: Jun 17 | SEC filing · Form DEF | SEC EDGAR | +0.00% | -0.08% | |
| Form DEFA14A BLACKROCK MUNICIPAL INCO | SEC filing · Form DEFA14A | SEC EDGAR | -0.57% | -0.41% | |
| BlackRock Municipal Income Fund, Inc. (MUI) Announces Tender Offer Contingent Upon Approval of Conversion of MUI to Unlisted Closed-End Interval Fund Structure | Press release | Business Wire | -0.57% | -0.41% | |
| Form N-CSRS BLACKROCK MUNICIPAL INCO For: Jan 31 | SEC filing · Form N-CSRS | SEC EDGAR | -0.01% | +0.34% | |
| Form NPORT-P BLACKROCK MUNICIPAL INCO For: Jan 31 | SEC filing · Form NPORT-P | SEC EDGAR | — | +0.25% | |
| Form N-23C-2 BLACKROCK MUNICIPAL INCO For: Mar 01 | SEC filing · Form N-23C-2 | SEC EDGAR | +0.00% | +0.34% | |
| Form NPORT-P BLACKROCK MUNICIPAL INCO For: Oct 31 | SEC filing · Form NPORT-P | SEC EDGAR | +0.00% | -0.17% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the MUI section they belong to.
Where else MUI is measured.
MUI earnings → · Analyst actions → · SEC filings →
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How the numbers are made.
How is BlackRock Municipal Income Fund, Inc.'s median reaction calculated?
Every labeled MUI news event is measured from its own timestamp: the last trade before the news is the base price, and the move is read at fixed horizons — 30 minutes of trading, then the close. The median across 72 events is what this page reports. Point-in-time, zero look-ahead: no event borrows information from a later one.
What counts as a positive reaction?
Any event whose price move is above zero at the horizon, relative to the last trade before the news timestamp. 47% of MUI's measured events are up at 30 minutes; the rest close the window flat or negative.
How often is this page updated?
The news table refreshes automatically as new events are labeled and priced. The reaction medians are re-pulled in batches from the dataset — the figures here are as of 2026-09-21.
Does MUI's past reaction predict its next one?
No. These are realized facts about past events, not forecasts. They describe a distribution — they say nothing certain about any future move.